Add this copy of On Formally Undecidable Propositions of Principia to cart. $35.85, new condition, Sold by BetterBookDeals rated 3.0 out of 5 stars, ships from Toronto, ON, CANADA, published 2022 by Dead Authors Society.
Add this copy of On Formally Undecidable Propositions of Principia to cart. $41.85, new condition, Sold by BetterBookDeals rated 3.0 out of 5 stars, ships from Toronto, ON, CANADA, published 1992 by Dover Publications.
